Raman scattering experiments from silver nanocrystals embedded in films of amorphous silica are reported. In addition to the low-frequency peak due to vibrational quadrupolar modes, a broadband is observed in the high-frequency range, with a maximum at about 1000 cm−1. The linear dependence of the position of this maximum on the inverse cluster radius is in agreement with the Raman scattering by single or collective electron-hole excitations.
Cite
@article{arxiv.cond-mat/0101471,
title = {Raman scattering by electron-hole excitations in silver nanocrystals},
author = {H. Portales and E. Duval and L. Saviot and M. Fujii and M. Sumitomo and S. Hayashi},
journal= {arXiv preprint arXiv:cond-mat/0101471},
year = {2007}
}